Disappearing or telescopic lawn sprinkler



W. H. GRAHAM 4DSIPIEARING OR TELESCOPIC LAWN SERINKLEH Dec. '25, 1928.

vvFiled Dec. 7, 1925 I INF/Emol;

- WlLuAwHERBERT GRAHAM L ATmRNEys.-

"Patentied Dec. 1928.

UNITED STA-TES PATENT i,cFFlcE.

WILLIAMl HERBERT GRAHAM, or QAKLAND, Cullmann.

Drsurnamnc on TnLEscorIc LAWN arman.

Application lec uecember 7,11925. Serial No. 73,571..`

The present invention relates to improvements in sprinklers and has particular referenceto disappearing sprinklers such as are commonly used in lawns or golf courses to benormally hidden below the surface of the `groundand to project upwardly under the influence of the Water pressure whenever the water is turned on. It is proposed as a particular feature of the present invention to provide a self cleaningsprinkler of the character described that automatically cleans the outer face of the ipe adjacent the sprinklerV head every time t e latter movesfrom inactive to active position andvice-Versa. It is the sprinkler head relative to a lpipe in suc inthe How of water. urther objects and advantages of my device will appear as the specification proceeds.

The preferred form of my invention is illustrated in the accompanyingdrawing in which:

Figure 1 shows'a' side elevation Aof my sprinkler in inactive position.

Figure 2 is a side elevation of the sprinkler in active position.

Figure 31s the s rinkler.-

an enlarged )section through i W ile I have shown -only the preferred l form of my device, I -wish to have it understood that various changes or' modifications Vmay be made within thescope of the claims hereto attachedwithout departing from'the v Y stated that` after the desired adjustment has v` spirit of the invention.

lIn the'drawing my. sprinkler is shownas i y being connected to a ground system of pipin including a horizontal pipe 1 and a vertica .pipe 2 rising therefrom. The latter pipe i comes within'a few inches of the ground surface indicated at 27 and has a reducer 3 threaded thereon as yshown at 4. The reduced portion 5 ofthe reducer slidably receives the .-.pipe 7 of the sprinkler 6 asshown at 9 and "supports a collar 10, the horizontal iange 11 of which rests on the flare' 9 while the vertii cal flange 12 confines the packing 13. The .50'

lit between the pipe 7 and the reducer 3 is very loose so that a considerable amount of water may be forced through the space bektween the ktwo `elements unless prevented by tliepacking'lS which, of course, does not be- Y comeactive nti-l the reached its uppermost position.rv

lbeen obtained the hood 15 mayl The top-.portion of thepipieifv is threaded f 1 as shown at 14 and basa hoodl screwed' thereon with a 'flange 16 extending downwardly from the hood and servin to check the stream of water'. passing throng the loose fit between the pipe and the reducer and to cause the saidwater to `flow downwardly onthe outside of the pipe 7 and of the reducer 3 for keepingvthe surfacethereof clean. 'i

- The sprinkler head is screwed to the-top of the pipe 7. and comprises a gland 17 formed wlth a preferably semi-circular recess in the A top face thereof and 'provided with athreaded flange`19allowing the cap 21 to be screwed thereon after'adiaphragm 20-'has been positioned between the .cap'and the gland.

.The recesforme'd 1n the topv of the gland 1s considerably larger than the circumference of the pipe 7 so that the-top face of the gland is presented as a comparativel narrow ring 22 and the diaphragm 20 is fb rmed with a plurality of circumferentiallyarran'ged holes 23 disposed just inside of the ring shaped top 22 of the land but outside of the vertical column of t e pipe-7 .so that when the gland is screwed downwardly until the bottom-face of the diaphragm comes in contact with the top ofthe pipe'7 the diaphragm forms a closure for the pipe and no water is p rmitted to pass through the sprinkler. vAs the gland.

is screwed upwardly the discharged area for the water increasesas the space between the .v

diaphragm and the top of the pipe increases so that the amount of discharged water may be controlled by adjusting the sprinkler head on the p'pe 7. -In this connectionit might be ber screwed thus serve as a locknut.-

The cap 21 is recessed in its bottom face as [shown at 24 and has-a circular perforation 26 communicating with the recess while v spiral vpassa es 25 connects the recess 24 with theperforatlons 23 of the diaphragm. When Aconnected in .the manner shown in Fi res 1 .and 2 a small casing 28 is preferab y provided around the sprinkler head to prevent earth from cavingwin. 4

Having described my' inventioml claim: 1.. In a disappearing sprinkler, a vertical thereto having a sprinklerv head at one end thereof and projecting upwardly when the pressure becomes active uponpthe sprinkler pipe connected to a controlled source of. water pressure, an element slidable relative ward motion of the former and made to allow water to escape therethrough while the element moves relative'to the pipe with a hood.

on the said element causing the escaped water to flow down the outside of the element and the pipe for cleaning both of them.

2. In a disappearing sprinkler, a vertical pipe connected to a controlled source of pressure, and terminating in a reducer, a second pipe slidable in said reducer having means at its lower end engaging the latter for limiting its upward motion and a sprinkler head at the upper end of the second pipe causing the latter to project upwardly when the pressure becomes active thereon, the second pipe fitting loosely in the reducer so as to allow water to escape between the same while the second pipe 1s in motion and a hood fixed to the second pipe checking the/,escaped water and causing the same to low down- ./ardly on the pipes for cleaning the same.

3. In a'sprinkler, a-pipe and a sprinkler head threaded thereon, the sprinkler head beingformed `with outlets outside the periphery of the pipe so as to allow theoperative I" means for supplying said body with water.

under pressure, a'nozzle slidabl mounted in said body, an adjustable sprin ler head on the end of said nozzle,.and means locking the sprinkler head in position'and for enclosing the joint between the nozzle and the body when the sprinkler is inactive.

5. In a water sprinkler, the, combination of a. body, a nozzle mounted in said body in telescopical relation therewith, a head adjustably mounted on said nozzle, a plate threaded to said nozzle inengagement with said head and provided witha depending skirt ada ted to surround said body when thespri er is inactive. j

'In testimony whereof'I silix` my signature.

WILLIAM HERBERT GRAHAM. 

